NuGet is a free developer focused package management system. It simplifies the process of using third party libraries. Download it from here
After you have installed the Nuget just start visual studio normally. Then create a new project “FacebookJoinGroup” Choose Tools -> Library Package Manager -> Package Manager Console New window should show somewhere looking like this
P.S. There was many changes in V6 so any example that have been published here aren’t working anymore. I will be creating a new ones with SDK V6.